Cereal grains represent the highest single food item consumed on the basis of energy content in both the United States and the rest of the world (Cordain et al, 2000). (blog.realfood-realhealth.com)
Before I go any further I would like to clarify, that I do not recommend anyone else live solely on PrimalKind or any other single food item for that matter. (primalkind.com)
Perhaps it is a single food item, maybe it is television or a favorite article of clothing. (relevantmagazine.com)